chore: regens API reference docs (#889)

diff --git a/docs/dyn/cloudtrace_v1.projects.html b/docs/dyn/cloudtrace_v1.projects.html
index 7b3eee0..b16b239 100644
--- a/docs/dyn/cloudtrace_v1.projects.html
+++ b/docs/dyn/cloudtrace_v1.projects.html
@@ -72,7 +72,7 @@
 
 </style>
 
-<h1><a href="cloudtrace_v1.html">Stackdriver Trace API</a> . <a href="cloudtrace_v1.projects.html">projects</a></h1>
+<h1><a href="cloudtrace_v1.html">Cloud Trace API</a> . <a href="cloudtrace_v1.projects.html">projects</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="cloudtrace_v1.projects.traces.html">traces()</a></code>
@@ -80,20 +80,22 @@
 <p class="firstline">Returns the traces Resource.</p>
 
 <p class="toc_element">
-  <code><a href="#patchTraces">patchTraces(projectId, body, x__xgafv=None)</a></code></p>
+  <code><a href="#patchTraces">patchTraces(projectId, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Sends new traces to Stackdriver Trace or updates existing traces. If the ID</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="patchTraces">patchTraces(projectId, body, x__xgafv=None)</code>
+    <code class="details" id="patchTraces">patchTraces(projectId, body=None, x__xgafv=None)</code>
   <pre>Sends new traces to Stackdriver Trace or updates existing traces. If the ID
 of a trace that you send matches that of an existing trace, any fields
 in the existing trace and its spans are overwritten by the provided values,
 and any new fields provided are merged with the existing trace data. If the
 ID does not match, a new trace is created.
+In this case, writing traces is not considered an active developer
+method since traces are machine generated.
 
 Args:
-  projectId: string, ID of the Cloud project where the trace data is stored. (required)
-  body: object, The request body. (required)
+  projectId: string, Required. ID of the Cloud project where the trace data is stored. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # List of new or updated traces.
@@ -158,7 +160,7 @@
                 # *   `/tid`
               "a_key": "A String",
             },
-            "parentSpanId": "A String", # ID of the parent span, if any. Optional.
+            "parentSpanId": "A String", # Optional. ID of the parent span, if any.
             "startTime": "A String", # Start time of the span in nanoseconds from the UNIX epoch.
             "spanId": "A String", # Identifier for the span. Must be a 64-bit integer other than 0 and
                 # unique within a trace. For example, `2205310701640571284`.